.table-box {
    padding: 30px;
    width: 60%;
    margin: auto;
}
.table-box .table {
    border-collapse: collapse;
    width: 100%;
    position: relative;
    background-color: #fff;
    color: #666;
    table-layout: fixed;
}
.table-box .table th,
.table-box .table td{
    width: 40px;
    height: 100px;
    min-height: 50px;
    border: 1px solid #3e3b3b;
    text-align: center;
    user-select: none;
}

.table-box #menu {
    position: absolute;
    top: 30px;
    left: 30px;
    width: 100px;
    background-color: #fff;
    color: #666;
    padding: 10px;
    border-radius: 4px;
    box-shadow: 0 2px 4px 3px rgba(0, 0, 0, 0.1);
    display: none;
}
.table-box #menu .menu-item {
    padding: 10px;
    cursor: pointer;
}
.table-box #menu .menu-item:hover {
    background-color: #eee;
}